It should be removed regularly by a dentist or dental hygienist; if neglected, it can cause bacteria to lodge between the gums and the teeth, causing gum infection, dental caries, loosening of the teeth, and other disorders. Called also tartar. gastric calculus gastrolith. intestinal calculus enterolith. lung calculus a hard mass or concretion formed in the bronchi around a small center of inorganic material, or from calcified portions of lung tissue or adjacent lymph nodes. Called also pneumolith.
1 Second, your graduation announcement should include the important details of who, what, when, where, and why. 2  This information lets the recipient know what they need to do and by when. 3  If your graduation announcement includes an invitation, RSVP information should be included.
Announcements â Mail your announcements two weeks before the graduation up to 2 weeks after the graduation. Invitations â Traditionally, formal events notify guests 6-8 weeks in advance. However, this rarely happens. The sooner you can notify the guests the better, try to stick within the range of 3-6 weeks. If your event is planned much further in advance consider sending out a save the date card before your invitations. Congratulations Graduates!!